SPF Explained: Myths, Facts, and Smarter Sun Protection
We all know that using sunscreen is the best way to protect your skin on those bright, sunny days. But there’s a bit more discourse on the best methods and products to use for the most protection against harmful rays. Hear board-certified dermatologist Dr. Alexandra Bowles share some insights and debunk some common SPF misconceptions, and be sure to check out the full article in Real Simple!
What are your thoughts on high SPF? Does it ever work better than the recommended 30?
High SPF sunscreens can offer slightly more UVB protection than SPF 30, but the difference isn’t as dramatic as many people think. For example, SPF 30 blocks about 97% of UVB rays, while SPF 50 blocks around 98%, a small difference that can create a false sense of security. What matters most is applying sunscreen generously and reapplying every two hours, no matter the SPF. I always recommend a broad-spectrum sunscreen with at least SPF 30 for daily use, and higher SPFs if you’re at higher elevations, near the equator, or have increased risk factors. Just remember: sunscreen is one part of a full sun-protection strategy. Don’t skip the hats, shade, and protective clothing!
What happens if you don’t apply enough of the high SPF or don’t apply it as frequently as needed?
If you don’t apply a high enough SPF or skip reapplying it every two hours, your skin won’t get the full protection listed on the label. This can leave you vulnerable to sunburn, premature aging, and even skin cancer. Underuse can also lead to uneven coverage, which increases the risk of pigmentation issues or flare-ups in sensitive skin conditions like melasma or rosacea. For SPF to do its job, consistency and the right amount matter just as much as the number on the bottle.
What is your recommendation for any and all sunscreen application?
I always remind my patients that how you apply your sunscreen is just as important as which one you choose. For full protection, apply a generous amount, about a nickel-sized dollop for the face and a shot-glass amount for the whole body, at least 15 minutes before sun exposure, and reapply every two hours when outdoors or immediately after swimming or sweating. Don’t forget commonly missed spots like your ears, neck, and the tops of your hands and feet. Sunscreen should be worn daily, not just at the beach, but also anytime you’re exposed to daylight, including while driving, sitting near windows, or taking a quick walk outside. UV rays are present year-round and can penetrate clouds and glass, so daily SPF is one of the best habits you can adopt for long-term skin health.
Which SPF products would you recommend?
Colorscience Sunforgettable Total Protection Face Shield Classic SPF 50 –This hydrating, antioxidant-rich mineral formula provides complete protection from environmental aggressors in a weightless texture that blends in sheer, for a natural bare-faced finish. I love the tinted formula and that they have different shades to choose from!
EltaMD UV Daily SPF 40 – Lightweight, hydrating, and perfect under makeup, this is a great everyday sunscreen for dry or sensitive skin. It contains hyaluronic acid and antioxidants to nourish while protecting.
La Roche-Posay Anthelios Melt-in Milk SPF 60 – Another daily go-to that’s widely available and works well for all skin types. Its non-greasy finish makes it ideal for layering.